Use Column to Set Index of pandas DataFrame in Python (Example Code)

import pandas as pd                         # Load pandas library

import pandas as pd # Load pandas library

my_df = pd.DataFrame({'A':range(18, 24),    # Construct pandas DataFrame
                      'B':range(12, 6, - 1)})
print(my_df)
#     A   B
# 0  18  12
# 1  19  11
# 2  20  10
# 3  21   9
# 4  22   8
# 5  23   7

my_df = pd.DataFrame({'A':range(18, 24), # Construct pandas DataFrame 'B':range(12, 6, - 1)}) print(my_df) # A B # 0 18 12 # 1 19 11 # 2 20 10 # 3 21 9 # 4 22 8 # 5 23 7

my_df = my_df.set_index('A')                # Use first column as index
print(my_df)
#      B
# A     
# 18  12
# 19  11
# 20  10
# 21   9
# 22   8
# 23   7

my_df = my_df.set_index('A') # Use first column as index print(my_df) # B # A # 18 12 # 19 11 # 20 10 # 21 9 # 22 8 # 23 7